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⇱ Písekite-(Y): Mineral information, data and localities.

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Písekite-(Y)

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About Písekite-(Y)Hide

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Formula:
(Y,As,Ca,Fe,U)(Nb,Ti,Ta)O4
Colour:
Yellowish brown to black
Lustre:
Vitreous, Resinous
Hardness:
5½ - 6
Specific Gravity:
4.032
Name:
After the locality of Pisek, Bohemia, Czech Republic.
A synonym for "Monazite-(Y)" (not a valid species) from Písek, Czech Republic. Possibly considered a valid species by some with formula (Y,As,Ca,Fe,U)(Nb,Ti,Ta)O4.


Name EncodingHide

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ASCII-7:
Pisekite-(Y)

Unique IdentifiersHide

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Mindat ID:
29146
Long-form identifier:
mindat:1:1:29146:8

Similar NamesHide

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PascoiteA valid IMA mineral species - grandfatheredCa2Ca(V10O28) · 17H2O

IMA Classification of Písekite-(Y)Hide

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'Grandfathered' (first described prior to 1959), Questionable

Classification of Písekite-(Y)Hide

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4.00.

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
0 :
0 :

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference for Standard
Pís-YIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of Písekite-(Y)Hide

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Vitreous, Resinous
Colour:
Yellowish brown to black
Streak:
Gray
Hardness:
5½ - 6 on Mohs scale
Fracture:
Conchoidal
Density:
4.032 g/cm3 (Measured)    

Chemistry of Písekite-(Y)Hide

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Mindat Formula:
(Y,As,Ca,Fe,U)(Nb,Ti,Ta)O4
Element Weights:
Element% weight
Nb37.796 %
Y36.169 %
O26.035 %

Calculated from ideal end-member formula.

Crystallography of Písekite-(Y)Hide

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Morphology:
Crystals elongated [010] and flattened {100}.

Geological EnvironmentHide

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Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 4b: Highly evolved igneous rocks>3.0
34 : Complex granite pegmatites

Common AssociatesHide

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Associated Minerals Based on Photo Data:
1 photo of Písekite-(Y) associated with SchorlNaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)

Related Minerals - Strunz-mindat GroupingHide

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4.00.Ferrotaaffeite-6N'3S(Be,Zn,Mg)FeAl4O8Trig. 3m(32/m) : R3m
4.00.Mapiquiroite(Sr,Pb)(U,Y)Fe2(Ti,Fe3+,Cr3+)18O38Trig. 3 : R3
4.00.'UM2004-19-O:AlCeGdZr'(Gd,Ce)4Al2Zr4O17
4.00.AlmeidaitePbZn2(Mn,Y)(Ti,Fe3+)18O37(OH,O)Trig. 3 : R3
4.00.VapnikiteCa2CaUO6Mon. 2/m
4.00.Microlite GroupA2-mTa2X6-wZ-nIso. m3m(4/m32/m) : Fd3m
4.00.'UM2004-21-O:CaFeGdZr'Ca2Gd4Fe5ZrO15
4.00.'UM2004-27-O:GdTi'Gd2Ti4O11
4.00.GoethiteFe3+O(OH)Orth. mmm(2/m2/m2/m) : Pnma
4.00.Pyrochlore GroupA2Nb2(O,OH)6Z

Other InformationHide

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Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for Písekite-(Y)Hide

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mindat.org URL:
https://www.mindat.org/min-29146.html
Please feel free to link to this page.

References for Písekite-(Y)Hide

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Localities for Písekite-(Y)Hide

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Showing 1 localities.

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the 👁 Image
symbol to view information about a locality. The 👁 Image
symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

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👁 Image
- This locality has map coordinates listed. 👁 Image
- This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. 👁 Image
- Good crystals or important locality for species. 👁 Image
- World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Czech Republic
  • South Bohemian Region
    • Písek District
Historic mineral collection National ... +1 other reference
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